Apparatus for creating and maintaining a vacuum.



AIO. 863,863. PAIEIITED AUG. 2o, i907 A. MANVERS & H. PHILLIPS. APPARATUS PoR CREATING AND MAINIAINING A VAGUUM.

' APrL'IoA'TIoN FILED MAY 9, 1906.

ALBERT MANVERS AND HNRY PHILLIPS, OF SYDNY,

NEW SOUTH WALES, AUSTRALIA.

APPARATUS FOR CI'tEATING AND MAINTAINING A VACUUM.

Specification of Letters Patent.

' Patented Aug. 2o, 1907.

y Application nea hayamos. serial No. 316,036.

' To all whom 'it may concern:

Bo it known that I, ALBERT MANvERs,a s bject of the King of Great Britain and Irelan'rlga' 5l Regent street, Sydney, in the'S Wales, Commonwealth of Aust] Llrs, a subjec't of the King oiG and a resident of 5l Regent st etl inthe State iof New South Wales, Commor'iwea tliof Australia, have invented new and useful Improvements in Improved Apparatus for Creating and `lylaintaining a Vacuum of which the following is a specific'atioii.`

This invention relates to a small appliance to be connectod to the chamber to be exhausted, and consists of an outer casing which is to be'connected to the chamber to be exhausted'and aninner tube, made in sections,

' to be connected to any suitable supply of water under a pressure of from 35 to 40 lb. to the inch. The first section of the inner tube terminates in a perforated disk, within a collar, that is perforated with holes to allow of communication between the space around the inner v tube and the inside of the tube. The Whole appliance terminates in a bulb, or chamber, into which the water pours from-the inner tube, and the water in this chamber serves as a seal to prevent back pressure of air. D

In the accompanying drawings:-Figure 1 is a longitudinal vertical section of the whole apparatus. Fig. 2

' is a vertical cross section of the same taken on the line 3.-2 of Fig. l.'

(A) is the outer casing and is provided with a nipple (B) whereby it may be connected to the chamber to be exhausted. Screwed axially-withinthe casing (A) is an inner compound tube (C) adapted to be connected,

at one end, to anysuitable supply of water under a A head, or pressure, ofnot less than lb. to the inch."

The inner tube (C) is of considerably less diameterthan the inside of the casing (A) so that there shall be a va- 'cant annular space (A1) between the outside of the nner tube (C) and the inside of the casing (A). The in# e ner tube (C) is made in our or moresections, any two adjacent sections being connected together by tapped collars (D).' vThese collars (D) are perforated with holes (d) whereby there may be a communication be tween the annular space (A1) and the inside of the compound tube (C).4 The rst section of the'inner tube (C),

(or that nearest to the source of water supply), termi- Dates in a perforated disk. The aggregate area of the perforations (c) in the diskrshould not be greater than comparatively large column of Water, that enters the tube (C), into a numbe.- of smaller columns, thereby presenting la. relatively greater surface. The passage .of the water throztgh the first collar (D) will induce a current of air from the annular space (Af), and, incidentally, from the chamber to be exhausted. This air will be induced through the perforations (d), in the collar (D), and will mix with the divided streams of water that are passing along the tube (C) through the collar (D), and will thus aerate the water. The aeration of the water will be repeated at the subsequent collars (D) l as the stream of water passes along the compound tube (o).

The extreme end of the compound tube (C) enters'a.l relatively large bulbous chamber (E), into which iti. discharges the aerated water. This aerated water,'beingf' 6 of greater bulk than when it entered the tube (C), will soon vfill the chamber (E) and thereby form an elastic 'water seal and prevent any back pressure of air aiong the exhaust pipe (F).

It is important that the outer casing (A) should be proof against leaks of airfrom Without.I To this end'a rubber washer (G), secured by a nut (g`j is placed over` the end where the water enters the tube (C). At the opposite end of the tube (C) the same result is obtained by the rubber washer (H), and thennetal washer (h). These two washers (,H h), are secured and maintained against a shoulder within the casing (A) by means of a' hollow nut (J) that is screwed into the end of the casing (A). The metal washer (h)` will also serve to center and maintain the free end of the compound tube (C) in a position parallel to the longitudinal axis of the whole appliance. It is important to remark that the bulbous chamber (E) is screwed on jo the outside of the casing (A) and is provided-with a iiexible washer (e) to prevent leakage. I Si. i The ends of the sections oi the tube (C), that face the incoming water are made bell-mouthedas at (01,) While A the opposite ends of the sections are square or flat as at 4(c2). vThis is to prevent the impingement of water against aat surface and to reduce friction.

In the event of an accident occurring, and water ooding the annular space (A1), a small ball valve (K) is placed beneath the nipple (B) sov that any flood of water from the annular space (A1) should lift the cork ball and close the entrance to the passage through the nipple. Furthermore, should the case (A) be flooded with "wa-ter, the water may readily be removed by open-` ing the valve (M). This valve (M) is preferably a flute key valve closing a small passage (m). It is but necessary to depress the lever and open the valve and the y10() vacuum in the casing (A) will be immediately destroyed and the water will flow out.

Having now described our invention, what we claim as new and desire to secure by' Letters Patent is 1. An apparatus for creating a vacuum comprising an outer casing, an inner casing tube in sections, perforated collars connecting the tube together and a perforated ut disk at the end of the tube nearest the receptacle to be w exhausted. I

2. In apparatus for creating a vacuum, an outer cars-Q11() ing hermetically sealed against the outer air, means for connecting such easing with the vessel to be exhausted, a tubejn sections axially placed within the outer casing,

4means for connecting the first section of the tube with a suitable supply of Water under pressulge, o. perforated end of the outer casing and a discharge pipe lending from said cover, all ns and for the purposes speeed.'

Dated at Sidney, ln the State of New South Wales, Commonwealth of Australia, thisvlth day of AprLA. D. 1906.

ALBERT MANVERS.

HENRY PHILLIPS.

In the presence of I I' MANFIELD Nnw'roN, ALBERT MAssriY. 

